Even though the systems differ in the contents of their laws and the institutions and professions which surround them, the indigenous sources of laws are in reality similar in all three jurisdictions. The proponents of codification regarded it as conducive to certainty, unity and systematic recording of the law whereas its opponents claimed that codification would outcome in the ossification of the law. Since Puerto Rico’s Civil Code is based on the Spanish Civil Code of 1889, accessible jurisprudence has tended to rely on common law innovations due to the code’s age and in numerous instances, obsolete nature. Roman law was a secondary supply that was applied only when regional customs and laws have been located lacking on a specific topic. Yet another goal of the legal technique is to balance state energy against federal authority.